As part of a weekly YouTube series, Porsche has announced five of its rarest factory models

In the depths of the top secret Porsche Museum warehouse in Stuttgart, Dieter Landenberger (Head of Historical Archive) showcased the incredible cars and their exquisite features.

Built in 1953, the 356 America Roadster leads the way as one of the rarest Porsche factory models – with only 16 of its kind ever built, RM Sotheby’s estimates the current worth of the car to be approximately $638,050 (£511,873).

First listed on the market in 1953 for $4,600 (£3,680) – a shimmering silver gloss has dominated the aesthetic for more than 60 years.

Porsche intensified its commitment to using 911 models in rally races and thanks to the aluminium and plastic aspects of this car, it used to be a great favourite amongst the esteemed private teams weighing just 1,050kg.

In 2017, RM Sotheby’s predicted the 911 SC/RS to be worth an estimated $213,508. (£172,653).

Coming in third on the prestigious Porsche list was the road version of the 911 GT1 – this model secured third place with its rare nature as a racing car that was made for the street.

Originally designed for the 24h Le Mans, only 21 models of the 911 GT1 have been produced

That said, the outstanding racing performance of this Porsche produced an impressive price tag of $856,536 (£685,400) back in 1997, and RM Sotheby’s suggests the car is now approximately worth a staggering $3,182,850. (£2,552,327).

Dieter said: “The 911 GT1 is a racing car that is approved for road use.

“The colour Speed Yellow was especially developed for it – nevertheless, only 86 were made.”

Numerous body components were manufactured with an extremely light glass fibre-reinforced composite and the rear and side windows were formed with thin glass.

One of the models was sold at RM Sotheby’s Auction for a staggering $1,200,166 (£962,288) in 2016 – over one million dollars more expensive than the first market listing in 1991.

With the top speed as high as 290km/h and the horsepower at 381, the 911 Turbo S (964) certainly delivers the speed.

So there you have it, the doors of the exclusive Stuttgart vault have been opened to reveal five unique Porsche factory models that belong to the rarest Porsche models in existence – all displaying the poise and power of this iconic brand.